did you hit creat new map on the launcher? it sounds to me like you just built the map itself with radiant and didnt generate the scripts. MAKE SURE YOU BACK UP YOUR .MAP FILE ON THE DESKTOP BECAUSE WHEN YOU HIT GENERATE AND NAME IT ITLL REPLACE THE .MAPFILE. THEN JUST OPEN THE NEW FILE AND ADD YOUR MAP INTO IT BY COPING THE BRUSHES, ETC. FROM YOUR BACKED UP FILE.